Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nghi chat so snippets" » "nghe chat so snippets", "nghiem chat so snippets", "nghia nhat so snippets", "nghi nhat so snippets", "nghi chat co snippets", "nghi chat bo snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("nghi chat so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nghi chat so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nghi chat so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nghi chat so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.